Ion hose instability

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August undefined, 2024

WebAn electron beam focused by an ion channel without a magnetic field, in the so-called ion focus regime (IFR), may be disrupted by the transverse ion hose instability. We … Web18 jul. 2024 · This instability is a direct result of beam-electron ionization of residual background gas, and the growth rate is proportional to the ion density. In a typical accelerator vacuum, there is little ion density decay between beam pulses, and the …

[PDF] The Ion-Hose Instability in a High-Current Multipulse …

WebThe ion hose instability in the ion‐focused regime is analyzed using a rigid beam model with phenomenological damping terms. Values of the instability wavelength, e‐folding … WebThe ion-hose instability growth between the accelerator and the septum quad is small, even without the strong Proceedings of 2005 Particle Accelerator Conference, Knoxville, Tennessee 0-7803-8859-3/05/$20.00 c2005 IEEE 376. solenoidal magnetic field as in the accelerator, because in accounting debit

Ion-hose instability in a long-pulse linear induction accelerator

WebThe ion-hose instability is considered to be a potential danger for long-pulse, high-current electron linear induction accelerators (LIAs). As is shown in this paper, it is also a concern for multipulse LIAs. WebIon-Hose Instability in Long Pulse Induction Accelerators George J. Caporaso and Jim. F. McCarrick Lawrence Livermore National Laboratory, Livermore, California 94550 USA Abstract The ion-hose (or fast-ion) instability sets limits on the allowable vacuum in a long-pulse, high current accelerator. inat inscription

Simulations of the Ion-Hose Instability for DARHT-II Long-Pulse ...

Hosing Instability of the Drive Electron Beam in the E157 Plasma ...

WebThe ion-hose instability is a transverse electrostatic instability which occurs on electron beams in the presence of a low-density ion channel. It is a phenomenon quite similar … WebThe ion-hose instability has been identiﬁed as a key limiting factor in long-pulse electron induction linacs [1– 3]. This instability is well known, and has been studied in detail for electron beams in induction linacs operating in the ion-focusing regime (IFR). This instability is similar in function to the resistive hose instability [4,5 ... inat in englishWeb29 mei 1992 · The conditions, when as a result of ion-hose instability development may be coming out of the channel by beam tail, were founded. It was showed, that suplementary … in accounting do you round up

"Web19 aug. 1991 · The asymptotic growth of beam-centroid oscillations is computed, and the growth length is found to be very rapid, indeed much less than the betatron period of the beam. A relativistic electron beam propagating through an ummagnetized, underdense plasma exhibits a transverse instability due to the coupling of the beam centroid to … " - Ion hose instability

Ion hose instability

LQKLJK EHWDSODVPDV - Institute of Physics

WebThis instability is a direct result of beam-electron ionization of residual background gas, and the growth rate is proportional to the ion density. In a typical accelerator vacuum, there is... WebThe ion- hose instability is a transverse electrostatic instability which occurs as a result of the interaction between the beam and the ion channel transverse motions.

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Web2 aug. 2000 · The ion-hose (or fast-ion) instability sets limits on the allowable vacuum in a long-pulse, high current accelerator. Beam-induced ionization of the background … WebThe ion-hose (or fast-ion) instability sets limits on the allowable vacuum in a long-pulse, high current accelerator. Beam-induced ionization of the background gas leads …

WebThe paper is organized as follows: in Section 2 we present linear theory predictions of the parallel fire hose, focussing in particular on the differences between proton and alpha contributions in driving the instability and the influence of a velocity drift between the species; in Section 3 we discuss the feedback of the instability on the plasma, deriving … WebA Plasma instability is a region where turbulence occurs due to changes in the characteristics of a plasma (eg. temperature, density, electric fields, magneti fields). As the name suggests, instabilities are unstable, though they may appear to evolve through different forms (morphology).

WebThe ion hose instability, which can seriously disrupt an IREB propagating in a focusing ion channel, is studied for the charge neutral Bennett-pinched beam. A rigid beam approximation predicts that the instability occurs in the long wavelength region, has a strong resonant growth, and has features of an absolute instability. Web7 okt. 2024 · The ion-hose instability is considered to be a potential danger for long-pulse, high-current electron linear induction accelerators (LIAs). As is shown in this The Ion …

Web16 mei 2024 · instability know as the electron hose instability. The linear theory of electron-hose instability in a uniform ion column predicts that for the parameters of the E157 experiment (beam charge, bunch length, and plasma density) a growth of the centroid offset should occur. Analysis of the E157 data has provided four critical results. The

WebThe ion-hose instability sets limits on the allowable vacuum in the DARHT-2 linear induction accelerator (2kA, 18.6MeV, 2µ s). Lamda is a transport code which advances the beam centroid and envelope in a linear induction accelerator from the injector to … inat iniciar sesionWeb11 nov. 2004 · A Study of the Ion Hose Instability in the DARHT-II Downstream Transport Region (Technical Report) OSTI.GOV skip to main content Sign In Create Account … inat investing asWebThe ion-hose instability is not a threat in the downstream system. Figure 4: The number of e-folding growth for a tickler excitation of the ion-hose instability varies with the envelope variation parameter µ and the fractional ion frequency spread δ. 4 KICKER SWITCHING AND SPOT SIZE DILUTION The DARHT-II kicker uses a modulated, solid-state inat localisationWebThe ion-hose instability has been identiﬁed as a key limiting factor in long-pulse electron induction linacs [1– 3]. This instability is well known, and has been studied in detail for … in accounting equation assets are equal toWebhose instability is a purely growing mode, or equivalently, is an aperiodic instability) provided the following condition for the instability is satisfied; The above instability … in accounting departmentWebThis instability is a direct result of beam-electron ionization of residual background gas, and the growth rate is proportional to the ion density. In a typical accelerator vacuum, there is … in accounting definitionWebA relativistic electron beam, propagating in an underdense ion‐focusing channel that is embedded within a broad region of underdense plasma, is shown to be subject to a hose instability due to coupling with plasma electrons at the edge of the pure‐ion region. The instability is studied by means of linearized analytic calculations of dispersion relations … inat nedir